VS23/24 Aircraft type?

I've been hanging out for reward flights for 3 months for my April trip to SLC (via LAX).
Nothing since November so decided to try via AMS - £2012 with expedia.

Delighted I seem to have got the 4 day sale just in time as my UC fare was £2100 on VS23 out and 24 back.

Choosing my seats however it looks like i'm on a 343 both ways. LAX? the which aircraft section says this is 100% 346.

Anyone done this route recently?

Thanks

From April to June the 23/24 will be operated by a 343 on selected days, according to http://airlineroute.net/2013/12/16/vs-lax-s14/