Forwards and futures differ in settlement mechanics.
Settlement timing
A forward settles once at maturity. A futures contract settles daily through margin, so gains and losses are realized along the way.
forward: one final settlement
Price link
When interest rates are deterministic, forward and futures prices coincide in this model, so both use the same cost-of-carry price.
F0=S0(1+r)T
Model note
The no-arbitrage argument assumes borrowing and lending at one rate, frictionless trading, and reliable delivery. US futures are CFTC-regulated. This is descriptive, not investment advice.
pricing model, not investment advice