That 63 A holds flat from 40 °C up to 50 °C; above that it derates to 60.48 A at 55 °C and 56.7 A at 70 °C, so if the panel ambient runs hot you lose about 10 % of the headroom. The interrupting ratings are the main event here: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V.
The 3VA1110-5EE32-0JA0 is a smaller-frame 3VA1 with a lower continuous rating (around 100 A class) and a different trip unit. The 3VA1163-5ED32-0AD0 shares the same 3VA1 platform — same width 76.2 mm, same depth 70 mm, same height 130 mm — so it drops into the same panel cutout and busbar arrangement without rewiring. The deciding factor is the interrupting capacity: this 63 A variant carries higher SCCR at 415 V (121 kA vs. the 1110's typical 55 kA range), so it's the right pick for high-fault locations where the smaller breaker would need upstream fusing.