If you are going to use the tuner, I would lean towards the Sony. Sharp's QAM decoding can be a bit finicky about how it displays some sub channels. PSID info can be set to, say, 32.8 but the Sharp may display it on 32.6.
Also have had issues when a 32", 46", and a 52" Sharp display of the same series would tune a particular HD cable channel, but the 40" would not. Exact same cable drop. Disassembly revealed different tuner boards from size to size, although all were LE700 series from a few years ago.
That being said, with over 60 of them installed in a 3 story campus recreational facility, there has only been two complete failures to date after 3+ years and 16 hours a day of operation. If you are only going to use outside sources, the Sharp is a safe bet if you like the picture.