Shares accepted vs hash rates? I recently started mining LTCs, and because Im using a Nvidia card (GTX 650Ti) I have been trying out different settings in order to maximize efficiency with the hash rates. 

I have noticed though that different settings result in different shares accepted. For example I can have the card running stable with a 90KHps but only one share accepted every few minutes.

Using different settings I get 50KHps but several shares a minute. 

Which results in greater LTCs mined in the same period of times? The greater shares or the higher hash rates? 

Im using CudaMiner with the following cmd:

cudaminer.exe -l K8x16 -C 2 -m 1 -i 0 -o stratum+tcp://coinotron.com:3334 -O workername.1:x

Any feedback would be much appreciated!
The pool might be adjusting your share difficulty level. For example, you might be mining at 50 KH/s and the pool is setting your share difficulty at 16. If you then increase your hashrate to 100 KH/s and the pool changes your share difficulty to 64, then you will submit shares half as fast, but receive four times as much credit for a share at difficulty 64 as a share at difficulty 16. Ultimately, you get paid twice as much mining at 100 KH/s as at KH/s, so don't worry about it.