Every dealer is different and some members will stay with one dealer, others will move around, it's all subjective.
Some members will want quicker delivery because of UK/US/EU stock, others are happy to wait for Chinese deliveries.
Some dealers have instant, near chat bot responses, others you'll be waiting for a reply.
Some dealers accept payment method A, others won't.
It's all about what suits you, as you're the one who'll be handing over the money, so you're the one who has to ultimately decide.
You're the one who should go with who you feel comfortable with. Best recommendation is to check out the dealer reviews/feedback and that will give you a sense as to what to expect based on recent interactions. Members will be both positive and negative in their feedback so you'll quickly see the pro' & con's (if any)
There are 24 TDs and you could theoretically ask 24 members and get 24 different answers. But at the end of the day, it's your money, so your decision to make.
Not being blunt, but if Trusty is slow to reply, pick another one.