I don't see this as an easy fight for either fighter, it really should be a very interesting fight.
Tim's strengths: Long reach, throws straight punches, height and weight advantage, determination, and it looks like he might have a good chin as well (ie: Cabbage tagging him solidly a few times and him barely blinking).
Tim's weaknesses: I think Tim's main weakness is probably if a good wrestler were able to get him down then they "may" be able to do some damage with a solid GnP game. (but you never know ... Tim works with good wrestlers all the time, and may be able to defend those attacks well?)
Andrei's strengths: Wicked thai kicks, counter punching, solid right hand, & footwork in the stand up. His ground looks good, but he rarely goes there anymore.
Andrei's weaknesses: His chin failed him against Datsik, but that was long ago, and he wasn't in top shape then .. so that may have contributed to that KO loss. Sometimes keeps exchanging on the feet when he should go for the ground (ie: against Rizzo). Not sure how he'll react to Tim slowly stalking him around the cage, it may affect him mentally (or, he may just give movement and counter over and over, and not allow the pressure from Sylvia affect him) ... I guess we'll have to wait and see how that plays out in February.
I really think this is a great match up and whomever takes it will probably eventually be declared the undisputed champ later on, as I think Mir will be out for a very long time recouping from his injuries.