ZIP-II 4 Vs. Transwarp //e (Mk1) -- Pros and Cons?

[GameGeezer]

I own both a ZIP-II (4Mhz) chip, and an Applied Engineering (original) Transwarp //e (also 4MHz).

 

I have always considered the ZIP Chip to be the better product, as it uses no slot. Wht pros and cons can you all list between these two that would dissuade me of this? 

 

These are in two, separate systems, and I haven't done critical benchmarks, but I expect the ZIP-II to be slightly faster by design, howeer, I do not know if the original Transwarp can be overclocked.