CPU performance and functionality wise not really, but z68 does let you use SSD caching.
spec for first board doesn't say PCIe 3.0. Its not a really important feature since only graphic card is going to take advantage of it. SSD uses SATA port not PCIe. and your graphic card is already set.
30gb ssd for boot. i don’t really recommend this, i mean if you have a Z68 board its more effective to use the (ISR). Windows alone it’s around 20gb. That leave you whit 10gb for programs and games.
And if you’re going to put games on your normal HD then what’s the point of getting an SSD? Just to boot faster? I think you should consider taking advantage of the Z68 technology Intel Smart Response (ISR).
I think whit such a small SSD it would be much effective to use (ISR) and that way you get more out of your SSD.