Second recommendation -- current supervisor or past manager?

My first recommendation is from my project manager from my previous consulting firm, where I spent about three years. But I'm torn between my current project manager and my practice partner from the last firm for the second recommendation -- especially since I have only been at my current consulting firm for about 9 months, so we haven't even finished a full review cycle yet (although I have scored very highly in our internal project review and in initial firm-wide review sessions). I'm also hesitant about giving my firm an indication that I might be leaving, even if it's only a year from now.

Thoughts on which route I should take? I know having a current supervisor rec is important, but will less than 1 year exposure even be enough to provide a valid timeframe of reference for the adcoms?

If it makes any difference, I already am using the optional essay for my undergrad GPA, and I'm mainly applying to the European schools.

Thanks!