Litecoin is enormously faster and especially so with BTC chain being all backed up. Plus the fees on BTC would wipe out half the gain while LTC is only a couple bucks.]
Also, it really only makes sense to do this on crypto you are cashing out to put into USD. Otherwise to get back into crypto you will pay the higher price on coinbase unless LTC pulls back of the arbitrage converges, but then it becomes an gamble as opposed to a transaction.