Both work fine. The LR will be warmer than the SR. If you like lighter flavors, like fruit, the SR will probably best. If you vape heavier flavors like coffee or tobacco, the LR might be better. It would be best to get one of each and see what works best with your juice. Here's a little formula to help you decide. More watts = warmer vapor. Most people like between 6 and 10 watts. Your ego starts out at 4.1V when freshly charged. It goes down with use to 3.7volts and stays there for most of the time. Plug both of those numbers into the formula to see what you will get with the different ohms of the Stardusts.
Volts x Volts / ohms = Watts.
With the LR and 3.7V, that's 13.69 / 2.3 (middle value) = 5.95 with the LR Stardust. That's when the battery has drained a bit. When it's fresh and running at 4V, it would be 16 / 2.3 = 6.95 watts. That's a really good number.
With a SR, it's 13.69 / 2.6 = 5.26 watts. Again, when the battery has stabilized at 3.7V
Because of the way they're built, they feel a little warmer than a standard carto. So, 5.26 watts feels warmer than it would in a normal Boge carto.
IMO, you'd should get the LR, but it depends on how warm you like your vape and what juice you use. Best thing is to try both of them.