I feel that you should not look at win/draw/loss statistics for this sort of thing. There are many problems with them (some openings are employed more often by strong players against weaker players or vice versa, some are skewed because some variation inside is often used as an easy draw, et cetera) but most importantly you are not the same as all those people.
I feel you should play the line that seems most logical to you, where the normal positions around move 10 look the best to you. It's purely a matter of taste. Remember, 2.c3 is theoretically innocuous but Tiviakov made a great career out of it; the Grand Prix was used for many quick wins by grandmasters in the 80s and 90s, Spassky had a huge winning percentage with the Closed Sicilian, and everybody plays the Rossolimo these days.
One of my favourite chess quotes:
As a young International Master, I used to devote much of my time analysing the very sharpest variations, hoping all the time that I would get the chance to engage my opponent in sharp variations that I had prepared at home. After a while, I began to notice something: I was losing lots of games in 'unimportant variations'. My opponents rarely seemed to 'take me on' but instead played quiet variations, just aiming for a typical position. I hadn't looked at these typical positions, hadn't thought about them, and didn't understand very much about them. This meant that even good versions of the theoretical line ended badly for me because I didn't understand why they were good, what exactly made the difference, and what I could aim for in this position that I couldn't in others.
(Matthew Sadler, Queen's Gambit Declined, about exchange variations with Nf3)
It's fine to reach an equal position out of the opening. You want it to be one of a type that you have analyzed twenty times and where you know exactly what your plan is, while the opponent knows that he is supposed to be perfectly safe but nothing else.
The Grand Prix is out of fashion, so it sounds like a perfect choice to me, if you like it. I once got destroyed as black after 1.e4 c5 2.f4 and now I knew "ah, this is the old move order -- I have 2...d5 3.exd5 Nf6 here and that is fine". And then I was playing the Tal Gambit without a clue what it was about...
What matters is that you make these openings yours. And if you pick the Open, pick a variation inside each main variation that you make yours. Form your own opinion, don't play the big main lines but pick the third most played alternative that grandmasters still play now and then but that you like.
And then become the expert on your lines, by figuring out what went wrong when it doesn't work out, and doing better next time. You will then always understand more about the resulting positions than someone who just memorized some "equalizing line" from a book.