Both the Kumho and the Multi-Mile are value-priced all-season, and probably old. I wouldn't think either are going to be very good in the winter. Check how old they are before you decide to match either up, both may be out of production. I really don't know which would be the better tire, probably the Kumho.
The date of manufacture is indicated by the last group of digits in the DOT manufacture code on the sidewall of the tire. The number is often stamped in a recessed rectangle. The DOT code tells who manufactured the tire, where it was made and when. The last group of digits in the code is the date code that tells when the tire was made.
Before 2000, the date code had three digits. Since 2000, it has had four. The first two digits are the week of the year (01 = the first week of January). The third digit (for tires made before 2000) is the year (1 = 1991). For most tires made after 2000, the third and fourth digits are the year (04 = 2004).