Nicolas' advice to try it on and the right one will speak to you is perfectly correct. But since you are asking for opinions on these two watches, I would go for the Reverso Grande GMT. The more I look at it the more I think it is just an extraordinary watch. It is like having two lovely watches in one. The number of functions so elegantly presented in the grande size Reverso is just amazing especially when you consider the relatively good price for this piece.
I think the WT Squadra is very thick, and it strikes me as the square version of the EWC without some of the EWC's most useful attributes. The Grande GMT is much more wearable in more circumstances and is, IMHO, a more elegant piece in almost every way. I think the only choice is strap or bracelet.
Good luck in your choice. And post some pics when you get the new watch.
respo
i have tried reverso grande GMT before, it looks really nice for me.
you should try both in metal first, sometimes it can't tell based on the photos.
let us know what will your final decision.
stefan

apart from the rest of the beautiful time pieces out there 

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The GranSport Chrono is an amazing watch, and the verso side of the Squadra WT is to die for, indeed.
Thans for the share, my friend.
Best,
Nicolas