Never used a scuttle before. Which one would be better, G12 or G20. Does it make a difference if my brush is a WD 24mm 50mm?
They don't make a brush scuttle per se. I guess the G5 would work tho. Becker states that ceramic holds heat better, just not as durable if dropped.The last time I talked to Debbie, they had most all colors in G5, G12, and G20 seconds. This is the link. I recommend you call about the seconds.
http://www.georgetownpottery.com/
I believe the bowl size is the same or similar and the reservoir is the only difference (though I could be wrong so you may want to check the website). I have the 20 and use it every shave.