Where are you getting your info from? Coinwarz show SBC more profitable than LTC.
Same place, during the period we were mining.
It almost changes too fast, if a pool switched as fast as that site does we would never solve a block. I learned quickly that mining LTC directly was a waste of my time and resources.
With LTC right now (3.8k diff), it would take about 3.1 days to get to .03 BTC at my hashrate (1150).
If I am getting any less than .01 per day here, it does not appear to be a waste to switch. I have heard talks of people making less than that here with more kh/s than I by double. This might explain the significant difficulty hike on LTC a few days ago. I am not the only one seeing it.
EDIT: Thought I would mention I saw this pool mining Litecoin recently, too.