IMO I prefer retics over burms for the fact they are a smarter animal. as some say burms are more forgiving than retics but with a retic you always now where you stand. with proper hook training I havent seen either species be more than a gentle giant. the problem I see with burms is people seem to think they are big lazy animals and they always let their gaurd down and that is when most accidents happen, where as with retics most tend to stay on gaurd and it seems to be there are less accidents with retics. Or people just dont report them as much as with burms. dealing with all the snakes burms,rocks,retics , bp's and so on the only two bites I have taken were from burms.
personal experience is the best way for one to figure which is best for them. so if you have the ability to help someone who has them try and get some experience and good luck and just remember , be prepaired for a work out as they grow.