Entry barrier is similar in both cases as both kinds of labwares need quality certification.
Glassware has more wider usability as it can be used even with organic solvents, but for most other purposes plastic-ware is quite capable.
In Glassware Borosil is gold standard. They even have strong pricing power.
Tarsons’ products are good but there are better products. However, they definitely have the best low cost products. Their products are also more widely available, but this can be a subjective experience because I researched in a Kolkata based institute.
In lab instruments, Borosil has just initiated its presence through Labquest brand. I personally haven’t had any experience with it yet. Tarsons instruments have already a good market share. Here also I can say that their products are not top-notch but still gets sold because of lower cost.