Database

[{"_id":ObjectId("7262718c217dda3ad90ef151"),"SomeText":"aaa","items":[{"status":500,"x":1,"y":"None","price":3},{"status":500,"x":2,"y":"None","price":4}]},{"_id":ObjectId("7262718c217dda3ad90ef152"),"SomeText":"bbb","items":[{"status":300,"x":1,"y":2,"price":7},{"status":500,"x":2,"y":2,"price":5}]},{"_id":ObjectId("7262718c217dda3ad90ef153"),"SomeText":"ccc","items":[{"status":300,"x":1,"y":1,"price":8}]}]

Query

db.collection.aggregate([{"$match":{"$expr":{"$ne":["$items.x","$items.y"]}}},{"$project":{"items":{"$filter":{"input":"$items","as":"item","cond":{"$ne":["$$item.x","$$item.y"]}}},"_id":0,"SomeText":1}},{$set:{items:{$map:{input:"$items",as:"item",in:{x:"$$item.x",y:"$$item.y"}}}}},{"$limit":5}])

Result