When comparing apples to apples (kinda'), CTC grip seems the way to go. Even though you're going to pay more for the CTC grips, they're a better value. Also, you get what you pay for.
LaserLyte:
• Power Output: Class IIIA, 5mw
• Batteries: 4 x 377
• Battery Life: 1 hr constant on, 2 hrs in pulse mode
• Range at Night: 500 yd., 457.2
• Price - $140
Crimson Trace:
• Power Output: 5mw peak, 633nm, class IIIa.
• Batteries: Two #2032 lithium batteries (included) + FREE batteries/year for life time.
• Battery life: Power source over 4 hours of on-time use and a 5 year shelf life
• Dot Size Approximately 0.5" diameter at 50 feet.
• Warranty 3 Years Complete
• Price: $227 (online price other than Crimson Trace site)