Gear inches are gear inches. If you're riding brakeless, you should be more concerned about skid patches:
44/16 simplifies to 11/4, so there would be 4 skid patches.
45/15 simplifies to 3/1 so there would only be 1 skid patch.
42/15 simplifies to 14/5, so there would be 5 skid patches.
43/15 can't be further simplified, so there would be 15 skid patches.
Special thanks to Sheldon "Get a front brake" Brown