I have yet to find anything similar to Curve. I think Curve is one of the most misunderstood scents on basenotes, partly because it's so synthetic, which makes it hard to pick apart. Curve is mossy. Platinum Egoiste? MB Legend? Fierce? No. These smell nothing like Curve.
Many Claiborne scents share a similar base and end up smelling kind of like Curve (Bora Bora, for example), but excluding those, I've never found anything that smells like it. If there were a less synthetic scent that smelled like Curve, I'd buy it in a heartbeat. Curve isn't one of my favorites, but I do enjoy it and I wear it.
Curve has gotten me a ton of compliments through the years. It's probably the safest compliment getter I own. I've been wearing it off and on since the mid to late 90s and I've never had anyone know what it was without asking me first. I have had at least 2 women buy a bottle for the next guy they dated after me, which I thought was hilarious! I'd hate it if a woman wanted me to smell like her ex!
A decade ago, Curve was pretty common, but these days, it seems to have been mostly forgotten. The name "Curve" comes with baggage, but the scent is a people pleaser.