The variety in the jewels vault is absolutely better for Amalia than for Elisabeth, but I suspect that once both heiresses turn 18 they both will receive a special tiara to be worn at royal events, weddings, jubilees & state visits etc.
My guess is that Princess Beatrix will hand over her absolute favourite tiara (Queen Emma's diamond tiara) to her granddaughter on the day she turns 18 and hopefully can do so herself !