The previous answers are all good and come from a solid place — which is to acknowledge the key role of your own consumer wants. They’ve answered the “What should I buy” part of the question.
However, what they may have omitted to factor in is the “What should I consider before deciding what to buy” component.
In getting a car or a laptop or a new suit, you wouldn’t necessarily just buy the one you initially liked more. You’d do some research (or a lot of it, depending on how much you’re thinking of spending) and then make your decision in light of both your own preferences and the information you’ve gained.
You might like the Tank more now, and you’re entirely justified in doing so — it’s an illustrious timepiece with a classic design. Andy Warhol wore a Tank, as did Truman Capote and JFK. The Reverso, as you’ve correctly pointed out, is made by a company with a far longer horological pedigree than Cartier, and has an edge in terms of traditional watchmaking prestige.
If you’re thinking of deepening your interest in mechanical cheap replica watches, the Reverso will be a great introduction to a company that historically supplied some of the greatest watchmaking brands in the business (and still does, actually). It’s less common a watch and will therefore also signal your awareness of quality mechanical watchmaking to people who notice that kind of thing.
You should also know that Cartier replica have exponentially strengthened their watchmaking expertise over the last 8 years, and some of their top-level watches can rival those of the most established Swiss brands in terms of technicality and complication.
Also, not all Cartier Tanks are made equal, and neither are all Jaeger-LeCoultre Reversos made equal. The choice between a Tank Solo and a Grande Reverso Duo is vastly different from the choice between a Tank Louis Cartier Sapphire Skeleton and a Reverso Squadra Chronograph GMT.
As you can tell, the choice can be as straightforward or as involved as you want it to be. Do a little digging around, and decide whenever you’re comfortable. If you want to go for the Tank simply because you like the look of it better, then so be it and that’s totally cool. If you decide that the Reverso will suit your purposes better in the long run then go ahead and get that instead.