Thule Stacker or Malone Stax Pro2

Does anyone have any feedback on Thule Stacker or Malone Stax Pro2? I like the cleaner look of the Thule, but have had good experiences with Malone customer support.

Currently I can car top one kayak…or use my trailer when I was to carry 4 or more…but there are times I only take out 2, maybe 3 and car topping is easier than trailering…sometimes parking can be a challenge. All kayaks are 10ish foot and 48-58 pounds. Ocean Kayak Venus and Wilderness Systems Tarpon 105.