We had checked, in offline stores stock has arrived and its available for buy, price are same as of online stores, but some retail stores are running contest’s and offering some free goodies, so do check your nearby store before you make a deal.
Just to recap specs, iPad Air 2 comes 9.7-inch display screen with screen resolution of 2048×1536 pixel, powered by A8X processor and M8 motion co-processor along with 2GB of RAM, features a 8MP iSight camera which support full HD recording, burst mode, panorama shots (43 MP), HDR, time lapse videos and 120fps slow motion videos, includes TouchID sensor and App Pay support, also supports 802.11ac MiMO WiFi which support up to 866 Mbps and over 20 LTE bands which provide speed up to 150 Mpbs.
While iPad Mini 3 comes with almost same specs of iPad Mini 2, all new it has got is support for TouchID and support for Apple Pay, but it lacks NFC which means you can use Apple Pay on Bricks and Mortar stores, you can only use it to pay online only.
Rest of the specs of iPad Mini 3 are the same as of iPad Mini 2 like 7.9-inch display screen with screen resolution of 2048×1536 pixels, under the hood it is powered by a 64-bit A7 dual-core processor with M7 coprocessor and 1GB of RAM. AT back features a 5-megapixel rear camera and a 1.2-megapixel front camera, houses a battery which can last for 10 hours.