Red and Blue Differences
The differences between the two cartridges lie mainly in the distribution of Pokémon. Eleven Pokémon are not available in Red, and eleven more are not available in Blue.

Not Available in Red:

Not Available in Blue:

There are also some Pokémon that are easier to find in one version.

Hard to Find in Red:

Hard to Find in Blue:

Lastly, there are differences in the prices and selection at the Game Corner. (TM prices are the same.)

Red Version Prices:
@ p180 @ p500 @ p1200 @ p2800 @ p5500 @ p9999

Blue Version Prices:
@ p120 @ p750 @ p1200 @ p2500 @ p4600 @ p6500