It makes a tremendous difference and that plain will not work! Maybe after an hour run time you could blast like 5 seconds if lucky!
CFM means Cubic Feet per Minute. This is how much air is moved though the device like compressor or tools per minute. The higher the pressure used for the tool the faster the stored air moves out of the tank. The compressor has to replace that air in the tank again.
You need the tank to store the air for various reasons, one is it gives the compressor time to rest and cool off when the tank gets full until you use enough air it needs to pump back up again. The bigger the tank the better and the compressor has to run less often. Also if your using air faster than the compressor pumps it, the tank fills and stores extra air while your doing other stuff, like switching parts or cleaning fresh blasted parts before doing the next parts. CFM more than the Blaster uses plus a large tank is best, CFM pretty close and a large tank will work, but you have to stop to let the compressor catch up and rest sometimes, CFM FAR below the CFM for the blaster will not work!
The compressor unit, that does the work, should be rated near the CFM or more than the tools you'll use. If the compressor CFM is less than your tools then when working the compressor will never shut off because you use more air than it compresses which also means you'll run out of air and have to stop and wait for the compressor to fill up.
My compressor is less CFM than my blaster uses and has a large tank 20 or 30 gallon? I blast a few minutes then the compressor starts running and I slowly run out of air and have to stop to let the compressor catch up. I'm not sure the CFM of my compressor, it's close enough to the CFM of the blaster that I can work awhile before I have to stop and often works out about the time I get a couple parts done and I have to stop to remove done parts and load others, so the compressor catches up and rests while I do other stuff than blasting.
This is maybe a 4-5CFM@90PSI for a 6CFM@90psi use so it's not too bad but still a pain at times.
I'm fixing my old LARGE compressor to use for blasting, this one is ok for now for the smaller stuff, won't be big enough when I do large stuff like axles and I would have to stop too often to let the compressor catch up and cool. I bought this compressor I use now before I was blasting to use for air tools like impact wrenches, air drills, ect that don't use high volumes of air for very long at a time.
This is ok for some tools to have a compressor with less CFM than the tools if the tank is large. Stuff where your doing allot of other things and not just using the tool constant. Like an impact wrench, use it a few minutes to remove the lugnuts, then not using it while you change the tire, gives the compressor time to catch up before you put the nuts back on. So the stored air in the tank is running the impact gun, compressor catches up while you rotate your tires.
On the other hand, an air sander, sandblaster, etc.. you use for a long time all at once, there is no chance for the compressor to catch up while your working.
If the CFM of the compressor is more than the tools that is fine, it just means the compressor will fill up the tank faster and shut off till it needs to fill tank again, this is good.
That compressor you showed is not good for much. Maybe use it for an Airbrush, perhaps an air nailer, air your car tires. Probably would be to slow for me to air my truck tires though! Certainly will not work for that sandblaster!
If your projects are relatively small. you probably don't need a big blaster like that either.
Of course you know blast media makes a big mess and is very bad to breath. You may want a blast cabinet of some type. You can buy one or build one, if you buy one it should come with a blast gun.
Some of those PRESSURIZED ABRASIVE BLASTERs are not too good, kinda dangerous even for some people. A Syphon gun is cheap and may work well for small projects. I just bought a small $99 blast cabinet for small parts. Building my own large one but I needed something portable and needed it fast so I bought this one. Other than being too small for me it works very good. I been blasting wiper arms, lug wrenches, and such in it.
It was about ready to use other than a light and shop vac for dust. Syphon feed sucks up the media stored in bottom of cabinet, media falls back to bottom for re-use so only need to load it once till you wear out the media. Use a good water seperator on the airline near the cabinet to keep media dry, so far no clogs for me and working well for small stuff.