Different strokes for different folks here. Both are great bows. You will find different things you like and don't like about each bow, so you gotta try them both and make up your own mind.
I may be completely wrong, but this is what I think; the most important thing with a bow (to me) is how comfortable it feels in hand, the drawing characteristics of it, the overall physical weight of the bow, and how quiet it is. If any of these characteristics don't feel comfortable to you, kick it to the curb and find something else.
I've had both bows. I think the standard grip on the Widow is way too narrow (I was alway fishing around for the sweet spot), if I was to have another one, I would like to have the Asbell grip. The grip on the Lee seemed to have much more positive hand placement.
As far as speed goes, the Widow appeared the be the faster of the two bows, never did run either one through a chrono, but that is what I observed. However, there didn't seem to be enough difference in speed to matter too much.
The last point I observed is quietness. Comparing a three piece takedown with both bow makers, I'd say the Bob Lee was hands down more quiet than the Widow(s) I've had.
Both are great bows. Either one you pick will be a good one. The "best" one will be determined by your personal feel.
Best of luck to you.