The Hart we saw in preseason looked like a better fit, or at least a more natural one, as a backup defensive minded true point. The Hart we've seen so far this regular season? Well, both the House of late last year and the House of so far this year was/are superior.
Hart could make a definite contribution here as a defensive change of pace, but he's simply not right now. Contract aside, if Hart played this way the whole season, it would be hard to see him retunring. He's just having no impact and certainly isn't keying any hoped for defenisve push right now. So I think the Hart/House comparisons are valid FOR THE MOMENT. If Hart starts to rededicate himself to defense and settle in, he may make it moot. But not yet -- right now House is having an impact, as he did for us down the stretch last year. And Hart is not.