I would consider the Southern approach on Russell easier and less exposed than the top chute on the MR. The chimney at the end of the Russell approach is only about 40-50 feet of easy climbing. Some of the exposure on the east side once you top out of the chimney is actually more exposed and the East Face route is definately more difficult and exposed. Some of these are mine and some are borrowed.
Here is a topo map of the route:
General route up the NF past UBSL to the Saki Col:
Closer View:
Head for the Thumb directly above the poser in this picture:
Then here are a couple of shots of the back side from the MR notch and Whitney:
Here two shots of the chimney at the end of the south side route:
I think you asked about doing this route in the Spring. As stated here I would consider this hike easier than the MR in the summer but could be much more difficult if not impossible in the Spring due to snow and ice on the North side of Russell's East ridge.