Question GPU suggestions

May 9, 2019
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MSI Radeon RX Vega 64 Air Boost + Division 2 + World War Z por 299€(335 USD);
Asus ROG Strix Radeon RX Vega 64 8GB OC + Division 2 + World War Z por 421€(471 USD);
Asus ROG Strix Radeon RX Vega 56 8GB OC + Division 2 + World War Z por 348€(389 USD);
Asus ROG Strix GeForce GTX 1660 Ti 6GB OC por 364€(407 USD);
Gigabyte GeForce RTX 2060 Windforce 6GB OC + SSD Gigabyte 256GB por 401€(441 USD)
My question is; the diference in performance between the Vega 64 air boost vs Vega 64 strix worth the price diference?

or what is yours suggestions.