I have:
-1 TB WD1001FAES 7200 RPM 64MB Cache Sata Desktop HDD currently installed with Windows 8 PROFESSIONAL as my main HDD
-1 TB WD1001FALS 7200 RPM 32MB Cache SATA 3GB/s Bare drive taken out of my external hard drive and installed internally as a secondary hard drive
-1 copy of Windows 8 OEM from Newegg (not used)
-1 copy of Windows 8 Professional OEM from Amazon (currently installed)

I am building my own COMPUTER, and was wondering whether or not using the secondary drive (7200 RPM, 32MB cache) in my new system would be noticeably slower than the 64MB cache one. If not, problem solved, and I'll install my new copy of Windows 8 on this one and use it.
If it is considerably slower, I was wondering what my options were to transfer this HDD to my new system while still being able to use both computers. A few people on this site say that if I simply move my main HDD to my new system, complications will arise, being incompatible with a brand new CHIPSET, processor, etc... In this case, would it be possible to
1) REFORMAT both drives
2) reinstall windows 8 Pro preferably or install Windows 8 on the WD1001FAES and use it in the new system
3) install whichever OS not used above in the WD1001FALS and use it in the old computer
Thanks in advance for your help, and feel free to suggest some nice HDD/SSD's that are worth the price.There will be no noticeable difference whatsoever...