[hatthew]

I am unlikely to fall for either of them, but given compromising factors as mentioned by the other commenter, I am much less likely to fall for dell..com than dell.

Due to the widespread usage of 3+ common TLDs (com, org, net, etc.) and arbitrary third-level domains, people have been trained that the second-level domain is the one that matters. Now that gTLDs are more common I've needed to retrain my brain that the TLD is also a necessary heuristic for authenticating websites.