The 2670QM is a quad-core, eight-thread processor, which is definitely more powerful than the dual-core, four-thread 2410M you currently have. Obviously, you'll only see a performance increase if the tasks you're doing can actually utilise the extra power.
If you're talking about replacing just the processor rather than the entire laptop, you need to tread carefully. If the laptop could originally be specified with the 2670QM then you should be fine, otherwise I'd stop now.