Do you plan to foreclose the new loan with part pre payments or do you plan to use the regular EMI approach. If you plan to foreclose, then there is no point in transferring anyway as you won't be paying much interest. (Again, you need to crunch your own numbers here).
Based on that, calculate the total difference in interest on your loan. To do that, the remaining loan tenure is also needed.
Once you have the savings calculated, then offset the MOD charges and all.
Then that money will be technically yours if you were to switch the loan. Then compare that with your lifestyle, is it worth it to do that?
For example, for some people 50K savings might not be worth the hassle to do this, but for others, it might be a pretty good savings.