That answer depends(wear them when I get giardia) mostly on the depth of your pockets... and If you operate from a place of timeless common-knowledge optical wisdom, namely:Are the B1.2’s $300 better?
1. ALWAYS buy the maximum amount (costliest) glass your wallet can afford.
2. SAVE UP and buy once cry once. and
3. Used-1-generation-old-Alpha-glass is still better than current gen Conquest/Trinovid/$1000 glass.... Then... YES they are worth the $300 upcharge in my opinion (like ar$eh0les).
Here is why: B1.2s have
1. Wider field of view (Who doesn't love it wider!)
2. Lighter weight (Yes please!)
3. Bigger optical sweet spot due to more field flattening. (No brainer)
4. Better/Brighter optical coatings. (See above)
5. Same great customer service, Japan build quality and focuser smoothness, and USA assembly (San Diego)/company headquarters Lander Wyo). (Buy America/jobs)
Full disclosure: I run Zeiss Conquest HD 8x32, Nikon Monarch HG 8x42, Maven B5 18x56, Maven 6x30, Leupold 8x32, Opticron Traveler 8x32, and Bushnell Legend M 8/10x42 in Marsupial gear harnesses.
P.S. I wouldn't be surprised or offended if 50% of optics nuts would argue (competently and logically) the opposite of this. Also, the flip side is that if $300 is a lot of money for a person, i.e. buys the Tags/gas/trip budget, and you would not be hunting for a season to purchase the B1.2, or, hunting this season WITHOUT $1000 class glass, then my answer changes to NO, NOT $300 better, buy the discounted B1 on sale for $700.
Also, For what its worth, my next optics purchase will be a Maven B1.2 in 10x42 and Opticron Aurora 10x42 to side by side and return the less ergonomically pleasing.