I know there are other varieties from Chico, such as Fortyniner (74/49). I have it and it is definitely different than Jumbo/MSU. The “Chico” I am referring to was the one sold by Rolling River back in 2013, without any additional numbers.
When I posted about this in 2018, @JesseS was the one who said they were the same variety, but I don’t think he’s been around for a while. As far as I could tell, the fruit was the same, so I didn’t dig any deeper.