Futures currencies and spot forex track eachother, so in terms of how they move they are the same.
You won't have any problem getting commission for futures of $5 a contract (per round trip) or a little less. If you are trading a lot of contracts per month you will be able to get commission for less.
Spread is pretty much always 1 tick (pip), except during extremely thin times, news announcements etc. Even though the spread is more than your typical spot spread, in my experience it works out cheaper to trade futures (unless you're just hitting buy/sell market), learn to trade with a price ladder and it will be cheaper for sure.
In futures you can see how much volume has been and is being traded at each price, how many contracts just traded at the bid etc, not just at your broker but in the whole futures market.
Regulation is a lot better than spot forex.
I have traded both, sometimes side by side and futures wins hand down for me. You will learn more about the market trading futures than you will through spot too.
Through a futures broker you will also have access to indices, interest rate/bonds and commodities.