There are a lot of differences between BTC and LTC.
BITCOIN LITECOIN
Coin limit 21 Million 84 Million
Algorithm SHA-256 Scrypt
Mean block time 10 minutes 2.5 minutes
Difficulty retarget 2016 block 2016 blocks
Block reward details Halved every 210,000 blocks. Halved every 840,000 blocks
Initial reward 50 BTC 50 LTC
Current block reward 25 BTC 50 LTC