LTC is currently a clone of BTC, but that will change in the future. However, they will still be very closely aligned. LTC uses Scrypt, so if a flaw is found in SHA256, then LTC security will be unaffected. This also applies in the reverse if a flaw is discovered in Scrypt. Ltc to put it short is an upgrade to btc in terms of block transfers and quickness and its doing just what it was created ti do