Difference between P3700 and 750 is basically the price tag and amount of NAND.
While both P3700 and 750 are basically same drive, 3700 is full blown server grade product with a lot of spare NAND for over-provisioning. 750 is shafted version of P3500/600/700. At home, user don't require or need 3 or 10 drive writes/day (DWD). 750 is rated at IIRC 70GB writes/day (0.3 DWD), while 3710 can take 10 DWD which is for 400 GB drive 10x400GB daily. That's what required with servers: Longevity with capital L.
I wouldn't believe much in tests of boot times. Each system is different, each setup has ups and downs. Tests are just that, tests. Add plethora of stuff to each, use it for couple months and compare results then. Bare-bone testing is one of the most pointless aspects of all reviews. I can say two words about it too. My 750 boots really blazing fast when it's the only drive in the system, OS is "naked" and everything run in UEFI. But add another 20 odd drives, few controllers, use legacy hardware and BIOS settings, etc... and everything suddenly slows down a lot.