I had a B44, it was safe but it was no where near as quick over a lap. You could rag the arse off it and think you've done a good time but at the end of the round you find it was just another average run.
The 410 is way more responsive, easier to maintain, stronger and jumps unbelieveably good.
Rango over anything else anyday. Their customer service, technical support, helpful team drivers and parts backup are second to non.