Well as someone who saw the same sale you saw, I thought I'd answer you. Also I have had a Nexus 7 until an unfortunate accident with a busy road and the multiple cars running it over, and my kids Mom decided she wanted to upgrade from her Galaxy Tab 2 7.0 to a 10 inch tablet, on a budget. We were looking at the Sony Tablet S, TF101, and A500/A200 because we could get them locally refurbished or open box for sub $300. She saw the sale for a brand new TF101 because despite the issue with it having come out in mid-2011, she doesn't play Tegra 3 only games, she doesn't do remote desktop into her laptop, she does do book reading, web surfing, casual games, email, wordpress publishing, picture viewing/taking, and movie watching. All of these things the Transformer will do, and do it well. However, it is 10 inches and though only 7 inches, it makes a difference. Personally despite the fact with the keyboard the Transformer is an affordable Netbook with power, I'm going to get another Nexus 7 when I can replace it, she preferred the Transformer and especially liked the keyboard because she could use it for her writing but detach it for the more common things to use it as a thin tablet for reading and stuff.
What is boils down to is "What do you want it for the most?"
- Gaming, then I'd be looking to spend some money to get the best experience doesn't come from eithier of these if it is the higher graphic intense ones as though you can play a lot of them on the Nexus 7 with the Tegra 3 chip, I've seen them on my friends Prime and there were some things that came out a lot better. (I like the gaming but differences personally still not enough to justify the price hike)
- Business, then it depends on size and what your business is. I use mine for work but it is for reading and walking into meetings and taking notes. I handwrite not type them and save everything to Evernote for transcription later, so the Nexus 7 is my right size. Have a friend who has 2 tablets, his self owned business and his personal one. 10 Inch laptop is used for work because he does diagrams and video presentations, he needs more people to be able to see it along with some connectivity. Home he has a Nexus 7 because he loves comics and doesn't care about high end games but wants the options to play some like Dead Trigger.
- Casual is also a size issue as both will do most things.