When I was saying that the Sabertooth is better than the Muckracker I was basing it on the fact that the initial cost is lower, both are 6s capable, not sure where you read that the Sabertooth motor can't handle 6s but it should be able too, saw some mention on RC Groups that it should be but I have not found if anyone has actually tried, tires are a moot point on a rtr because you will most likely change out the tires anyway. The Muchracker has 1 parts supplier Horizon Hobbies, the Sabertooth has 2 Hobbyking and Value Hobbies, as parts for the Acme Dominator also work on the Sabertooth as they are pretty much the same vehicle but with different chassis layouts.
Remember looks can be deceiving.
The fixes I have seen for the Muckracker upper a-arms involve making your own parts on a CNC, and have you priced one of those out lately? Yeah I'm not spending a few thousand dollars on a cnc to make parts for $250 rc car. And I highly doubt
@Jimbobjr has any plans to start making those custom parts to sell either.
The fixes for the Sabertooth involve using parts from other rc cars that are already made and readily available on the market.
The Sabertooth has been around for nearly 5 years and it doesn't look like Hobbyking has any plans on discontinuing it.
The Force RC brand of vehicles have all for the most part been discounted down to rock bottom prices compared to what they were even a few months ago and the future of this brand is uncertain at this point.
That is my reasoning behind saying that the Sabertooth is better but it is just my own personal opinion based on my own observations. And I didn't say that it was much better, just that it was a better choice again based on my own opinion and observations.