Are all SSDs alike?

I'm SSD illiterate. I want to swap over my cdrive on my win7 64 desktop PC to an SSD. Are they all alike? Is there a 'quality' brand etc?

Like all things there are good ones & not so good ones. Generally speaking you get what you pay for, so a cheap one will probably be less reliable in the long term.

Samsung are probably amongst the best, so shop around for the best price. Big Gb capacity SSD's are still very expensive, but you can get some reasonable prices on 128 & 256 Gb ones.

I see samsung offer 250GB EVO & 256GB PRO. The EVO is up to $50 less. Is there a performance difference?

Yes there is a slight difference but it's probably only marginal & in every day use probably not noticeable. I am using the 256 Pro & I am very happy with it. The Pro generally has the better test results.

If you search the web there is a lot of information & you can compare the test results, so you see for yourself which might suit you best.