Would a Tonkinese be less loud than a Siamese but more social than a Burmese?

Yes, that's exactly right. The Tonkinese sits right in the middle between the two parent breeds. They have the vocal, chatty nature of a Siamese but at a lower volume and frequency-less demanding and piercing, more conversational. In terms of sociability, they’re more outgoing and people-oriented than the typical Burmese, who can be a bit more reserved with strangers. Tonkinese are known for being social butterflies with both humans and other pets, without the intensity of a Siamese or the occasional aloofness of a Burmese. If you want a cat that’s interactive and talkative but not overwhelming, and friendly without being needy, a Tonkinese is a solid compromise.

Tonkinese vocalizations are notably softer and more varied than a Siamese's trademark yowl. A Tonkinese will still communicate with you-often with a pleasant chirp or trill-but it won't demand attention at full volume. As for sociability, the Tonkinese is indeed more outwardly affectionate than the Burmese, which can be a bit more selective or one-person oriented. I've observed that Tonkinese will typically greet visitors at the door and enjoy being the center of a group, whereas a Burmese may observe from a comfortable spot first.

The Tonkinese strikes a nice balance between the two parent breeds. You'll still get the vocal, chatty nature of a Siamese, but the volume and frequency are turned down-more of a conversational meow than a demanding yowl. In terms of sociability, they tend to be more openly friendly with strangers than a Burmese, which can be a bit more reserved or one-person focused. I've seen Tonkinese walk into a room and greet everyone, whereas a Burmese might size you up first before warming up.