Probably, but you can't play the what if game. Reggie may not have been so frustrating had he not made some decisions like throwing it away on 4th down but the fact is he did and that shaped our perception.
Tevin was very good at running the base option. He made good reads most of the time. However, he was not super athletic and rarely had breakaway runs. Vad has a great deal more athletic ability. I also think that for us to be as successful as we can be we need a QB that would be successful in a more traditional offense as well. Tevin would have been a horrible QB in a traditional offense. I saw him miss way too many wide open plays and he was not very good at passes over the middle. I've already seen Vad make those kinds of throws as well as deep passes that Tevin never had the arm to make. The biggest knock on Vad is his decision making and that certainly comes with experience. As he improves that then I believe his ceiling is very high.
In my mind, it's important to distinguish between emotional and factual claims. I have no problem with someone saying that they react to Tevin like they react to Reggie because when they felt we needed a big play he didn't deliver. However, my earlier question still stands with respect to what passes Vad made that TW was incapable of making. Which throws at what distance did Vad make that TW didn't have the arm for?
Of course, your "way too many wide open plays" is subjective and beyond challenge. 2 or 3 in crucial situations is way too many in my book, at an emotional level, but that doesn't translate into assertions about his ability. For example, I expect that USC's Wittek is one of the best QB's of his class in terms of strict QB ability and capability of making the throws, but he crapped the bed in this category of missing wide open plays in the Sun Bowl. Would you also say that Wittek's a horrible QB?
On what basis do you assert that he "was not a very good passer over the middle," an emotional reaction or do you have facts to back that up? Again, I have no problem with people expressing their emotional reactions to players, I just wish that it didn't translate into sounding like they were stating objective facts. By the way, I'm prepared to see the objective facts to back-up your claim; I'm not saying that YOU don't have them.