Hi there!
Just chiming in with the lovely
@MrsFlynn, those computers could
definitely run the Sims 3 on high!
BUT - I would encourage you to shop around. The price tag on those two are super high for PCs that aren't even the same quality of my own desktop I built (for about $1400 to build from scratch and it's a beasty computer, SSD, top of the line graphics card, motherboard).
I also just helped a fellow forum-goer buy a desktop for less than $1000 that could easily run the game on maxed settings with all expansions (thanks to the HP sale that was going on).
Either way, those computers definitely do work, but you could get something similar for a lot less money spent if that would be of interest to you!