The czech low-cost tire has high projected mileage and is good on snow, but lacks a bit of wet and dry performance. Pricewise, it can match the low-cost chinese tyres and in comparison, it's definitely a better option.
175/70 R13 doesn't belong to the most popular dimensions for winter tyres - there are 21 tyre models available, which can be compared to 185/65 R14, 155/65 R13, 155/80 R13. Let's break down the sizing - 70 is height of the tyre, which is calculated as 70% of the tyre width (175mm), which means the sidewall height has 122.5 mm. The wheel diameter is R13, which means it fits to a 13 inch/330.2mm diameter wheel. The total circumference of the tyre is 1807.04 mm, which is very similar to 195/50 R15(1809.56 mm), 175/55 R15(1801.7 mm), 160/60 R15(1800.13 mm), 185/60 R14(1814.58 mm), 155/80 R13(1816.47 mm), 215/40 R16(1817.1 mm), 165/60 R15(1818.98 mm). There are multiple speed indexes available for winter tyres in 175/70 R13: Q(160km/h), T(190km/h). The same goes for weight indexes: 82. You can find 175/70 R13 on 27 car models - mainly Hyundai, Kia, Seat, Daewoo, Ford.