I have owned a Kemble Classic for 25 years and can assure you they are suitable for a learner from being a beginner to becoming an advanced player. It all depends on its condition and whether it has been properly maintained. If you are buying from a shop which offers a guarantee it is probably OK. If it is a private sale it is recommended that you take a piano tuner with you when you go to look at it.
As to the Essenfelder (probably made in, Chiner, not Germany) if in good condition it may be better than the Kemble. Taller piano better Bass also 88 note over 85 compared with the classic.
As chrisw said "get a tuner to look at it for you "
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