Start with the labels themselves, because they say less than they seem to. "Ver.2" tells you that a second version of an item exists, and nothing more. "Renewal Edition" tells you that the item is an updated release of something that came out earlier. Neither label explains what was updated. It is easy to read "renewal" as better materials, a new design or a changed price, but the label does not say any of that. If the announcement does not spell out a change, treat the change as unknown and wait for a product page that describes it.
Next, look at what kind of post you are reading. Many merchandise announcements are only teasers. A teaser gives a title, a listing date and the name of a shop, and often stops there. That is not the same as the item being available to buy. Prices, sizes, materials and specifications usually arrive later, on the shop's own product page. So when a post carries a version label and a short set of lines under the title, read it as a notice that something is coming to a particular place at a particular time, and not as a full description of the product.
Now the two lines that usually sit under the title, the calendar line and the pin line. The calendar line holds a date and a time. It marks the moment the listing is expected to open at the shop named on the line below it, which is the pin line. Look for a time zone written in brackets next to the time. That bracketed zone is the one to convert from, so if you live somewhere else, change the time into your own zone before you plan around it. If no zone is shown, do not guess one. Check the act's official channel for a clearer version of the notice.
Finally, remember who decides what. Stock, the regions a shop ships to and any limit per person are set by the shop, not by the announcement, so a teaser cannot promise them. The earlier version may stay on sale or may not, and a version label alone will not tell you which. Wording varies from post to post, a teaser rarely lists prices or specifications, and a shop can change a listing time after the notice goes out. The reliable checks are the shop's own product page once it goes up, the act's official channel and its official notices.