Plus, the Acer unit is not getting any love from anyone right now. It's sort of Transformer-lite but you can get it in the US earlier than the Transformer and spend an extra $50 for that privilege.
It does have USB on the tablet side, while the Transformer has a bit of a kludgey USB port. It has worse glass than the T-former and I think the weight is roughly the same. There are no keyboard-docking options with the Acer, which only has weight on those folks who think a keyboard is necessary. I simply like the option that if I want a tablet now, if I change my mind and want a keyboard, one is there straight from the manufacturer.
But like I started with, the Acer is getting no love. No idea if XDA will have a forum for it or anything, but look at what's getting created here with this site. It's a lot of fun and security to have a techie community like this supporting a product like the Transformer. Look at the love the ipads get and the community behind it, that's a big draw to know that you're making a financial investment ( $400+ ) in something and that you're not in that boat alone.
** steps down off the soap box **