Interest... hedging... the interest wouldn't be your sole rationale for hedging, would it? That doesn't work. No, the funds will not be the same. There's no free lunch here (=risk-free arb).
Any carry, or positive interest income, from your position's spot leg will be more than offset by an equal (in theory) but, in fact, a larger (in the real world) continuous convergence to 0 in the basis, or price difference of the spot leg and futures leg. IOW, the currency futures price at any time correctly reflects the IRD (interest rate differential) until expiration, at real (as opposed to retail) rates.
Your account value ("the funds") will decrease -- thanks to daily futures MTM (mark to market) -- the faster the more leverage used. Try it on a demo for a few days and see for yourself.
Any carry, or positive interest income, from your position's spot leg will be more than offset by an equal (in theory) but, in fact, a larger (in the real world) continuous convergence to 0 in the basis, or price difference of the spot leg and futures leg. IOW, the currency futures price at any time correctly reflects the IRD (interest rate differential) until expiration, at real (as opposed to retail) rates.
Your account value ("the funds") will decrease -- thanks to daily futures MTM (mark to market) -- the faster the more leverage used. Try it on a demo for a few days and see for yourself.