I bought my first two pairs of Takatsuki 300B in 2015 when the Yen/USD was 125. Bought them directly from the official distributor in Tokyo when I visited. I used them until one tube blew due to a shorted coupling cap. Bought another pair (can only buy in pairs) and used them until early this year when I bought a quad of the new WE300B. Mind you, I am using a pair of differential push-pull 300B, so the difference might not be the same as SET amps. The first thing I noticed with the WE is that they are much quieter. The background is blacker. Since I drive my compression midrange (111dB /1 watt) directly with just a DC blocking cap in between, they are very sensitive to noise. With the Tak, I was able to get the noise voltage down to 1.8mV. With the WE, the noise was unmeasurable on my Fluke meter. And I rarely needed to adjust the hum balance in the past 6 months. The bias has remained stable all this time. This tells me that the quality of the WE is extremely high. Of course, the Tak is no slouch in this regard, compared to other current manufactured tubes from China and Russia, but I feel the WE is of even higher quality. The two brands are tonally very similar, but the WE is definitely quieter. I tested the original 6-year-old pair of Tak on my eTracer and they are still closely matched and tested almost new, so no issue with longevity with this pair at least.