The two (or three) products you are trying to compare against are distinctly unique.

The Tumi Latitude line is a ballistic poly-propylene based composite, while RIMOWA Essential/Lite lines are polycarbonate based composites.

I'd recommend picking 3-5 important metrics, that matter to you (price, capacity, materials, functions, etc.), when considering what your next luggage purchase may be. Narrowing down the evaluation criteria can give you more prescriptive feedback to help you with your purchase decision.

From my perspective, they are completely different products, that serve different needs of their intended users.