As support answered me, if I upgrade my old VPSDiscovery plan then I get: Linux VPS One with "15GB space, 300GB bandwidth, 192MB RAM"

But on the order page I see, if to order a new, I will get:
25GB Raid Diskspace, 448MB Ram, 450 GB

So, is it reasonable to close old and order a new one? Or there are some hidden obstacles?