The Alpin 6 was introduced back in 2019, but still holds up surprisingly well compared to the current competitors. It's pricey, but Michelin promises it will maintain it's performance during the whole lifespan, which is rarely tested.
225/50 R16 doesn't belong to the most popular dimensions for winter tyres - there are 9 tyre models available, which can be compared to 165/80 R13, 155/70 R19, 155/80 R13. Let's break down the sizing - 50 is height of the tyre, which is calculated as 50% of the tyre width (225mm), which means the sidewall height has 112.5 mm. The wheel diameter is R16, which means it fits to a 16 inch/406.4mm diameter wheel. The total circumference of the tyre is 1983.6 mm, which is very similar to 205/55 R16(1985.17 mm), 180/55 R17(1978.58 mm), 185/75 R14(1988.94 mm), 215/40 R18(1976.69 mm), 245/35 R18(1975.12 mm), 195/70 R14(1974.81 mm), 295/30 R18(1992.4 mm). There are multiple speed indexes available for winter tyres in 225/50 R16: H(210km/h), V(240km/h). The same goes for weight indexes: 92, 96. You can find 225/50 R16 on 10 car models - mainly BMW, Ford, Volvo, Audi, Jaguar.