Call design, gut setting can each make a big difference in how easy the call runs for you. Even though I have the same type guts in all the calls I use for hunting (except the GVCC XXX), they each run a bit differently. I try to set them up so they sound much the same way, but some require more or less air than others. Some require the air to be "popped" into the call harder ..... more back pressure or less back pressure. So, expect that you will have differences in how each call will run.
Stick with the call you find easiest to run for now. On your other call, mark the reed as shown in the pic with a Sharpie pen at the junction of the reed and edge of the wedge and notice how closely the reed tip is to the end of the tone channel. It should be as close as possible (a few thousandths of an inch) and yet you should still be able to press the tip down into the tone channel without it rubbing.
Buy several spare reeds from the call maker and watch some youtube videos on adjusting your call and on shaving your reeds as part of the process. The calling forum of the Refuge as a very good tutorial by Wade Walling on tuning the short reed call. I'd recommend you reading that carefully, too. then, you can play around with your call and see what things you can do to the reed setting to make the call sound better and/or easier to run.
This pic shows the Sharpie line made at the wedge/reed junction. Also, it shows another black line made where I put a slight upward bend, which makes the reed break over easier, though requiring a little more air to do so. It also reduces the tendency of the reed to rub against the back of the tone channel as the tone board breaks in. If you set the reed tip very close to the end of the tone channel, as it wears the tone board, the tip can start to rub against the back of the tone channel, which you first notice as the call starts becoming harder to run fast. Bending the tip up slightly eliminates the rubbing and allows the call to run easier and faster. I bent it up at a 45 degree angle with a hemostat (needle nose pliers will work) and it relaxes back to a point where it wont straighten out completely. The bend is made at the tip side of the black line, not at the bottom of the black line.