That said: If we're talking about the Para 4 / Millie 2: No second thought, just because for me a comp.lock can't match a backlock in outdoor use, or, as Lance / Surfgringo pointed out in another thread: Marine use (which I know almost nothing about).
Millie 1 with its great and perfect outdoor linerlock would make me think for a second. But not longer.
Stretch 2XL SE would still be my choice:
- Lighter, shorter and slimmer in pocket
- About the same blade length, but shorter closed package while presumably still offering a bit more actual grip area
- Thinner blade stock
- I prefer the long, straight edge section over the continous edge curve of the Millie
- Tip up option