It is if you're talking about the cost of equipment; Litecoin can still be mined with GPU's (as they use a scrypt algorithm) which hold their value relatively well, whereas Bitcoin mining will pretty much require an investment in ASIC's which are useless for pretty much everything other than Bitcoin mining. Bitcoin's difficulty is also exponentially higher than Litecoin's.

If you're talking about return on investment, it was a toss-up back then but Litecoin's price dropped hugely after I started to mine. I ended up selling all of my equipment within 6 months of starting my mining operation because the price tanked from ~$19.00 to ~$5.00. The cost to mine was more than my return, and I didn't see any price rebound on the horizon. I stay away from mining now and concentrate on day-trading. Nowadays if you're interested in mining, one of the alt-coins at any given time would probably be most profitable, and if you join a mining pool you can set your miners to automatically mine the most profitable coin.