Some of the Mini's advantages...
* The op rod keeps hot dirty gases out of the action, which both aids reliability and makes cleaning easier
* It breaks down into large pieces for cleaning that are difficult to lose
* the mag release and safety are ambidextrous, making it more lefty-friendly
* The chamber can be easily reached in the event of a malfunction
* It does not look like an eeeevil assault rifle (assuming you get one with a wooden stock) - THIS MATTERS IN CALI!
* If the S really HTF and you are out of ammo, the steel/wood Mini is going to be a very effective hand-to-hand implement for butt stroking someone to the head - try that with an AR and it will likely end up in broken plastic/aluminum pieces
To address some points made in this thread -
* The newer Mini 14s (with the tapered barrel) are plenty accurate. As in 5-rd, sub 2 inch group, at 100 yards, with a scope - using el cheapo ammo.
* Ruger has factory 10 rd mags available. Saw them recently at Cheaper than Dirt for $25 ea. Not exactly too costly.
Either will work for the application. However, being in CA - I would strongly encourage the OP to look hard at the Mini with wood furniture.
And BTW - your current lever gun will work too.