For out to 500-600, flip a coin. You can easily do it with less gun too.
We use my sub-9# .280AI w. 175 Elite @ 2976 or sub-10# 7RM w. 180 Hyb @ 2996 for elk. Out to 882 so far. Further than that, or if they present a closer shot while glassing, the 15.5# .300 RUM pushing either a 215 Hyb @ 3100 or a hot 230 Hyb @ 3113 has flattened them with authority.
Weight is definitely a consideration in elk country. So depending on your rifle weight, and planned activity for the day, and possible shot distance, that would be my determining factor. Elk hunting and harvesting can happen from 10 to 1000+. Either of your rifles sound capable of that, as long as the shooter is.
The 195 EOL has way higher BC than the 200 NAB. But MV would dictate which one carries more energy down range. If they are comparable velocities, the 195 will pass the 200 in short order at distance.
Here is my .300RUM
View attachment 192354
View attachment 192355