I have the mini with 4 gb of ram running 10.6.8, and just bought a good condition used mid-2010 MBP with 4 gb of ram, 2.53 ghz, yosemite. Should the MBP be on a par speed-wise with the mini. The mini has a 320 gb hdd, the MBP has a 500 gb hdsd hybrid. I'm awaiting the MBP delivery tomorrow. I basically use the mini as an appliance for writing using Word for the Mac. And will use the MBP the same in conjunction with the mini. TIA