There are several more considerations. First, the Tamiya kit offers absolutely no hull penetrations below the waterline while the Revell kit is much more detailed in that regard. All ships have such penetrations and they add greatly to the realism of the model. Second, the Revell kit has a very nice one-piece main deck whereas the Tamiya kit has those hideous seams to fill trying to make the three-piece main deck work. I have seen otherwise nice models built from the Tamiya kit that were spoiled by ineffective sanding of those seams.
The third consideration is overall cost. In order to get those nice PE watertight doors as well as railings, radars, etc., requires two sets of PE. The very nice Gold Medal Models set of PE for Bismarck/Tirpits does not contain watertight doors. Finally, you would need to get a third set of PE for German-style portholes with appropriate "eyebrows" to add significant detail to the very bare Tamiya bulkheads, especially on the aft superstructure. Three separate sets of PE added to the price of the original kit can be an expensive proposition, especially when the Revell kit includes those details.
I'll say it again; I sold my Tamiya kit after I bought the Revell kit because, in my opinion, the Revell kit is a much superior product in every regard to the Tamiya kit.
Good luck!
Bill Morrison