Protobuf groups and messages

I have a question regarding message and group intercompatibility. Can data encoded with first proto be decoded with second proto structures? Or they have different wire formats and are not intercompatible?

First proto:

message SearchResponse {
  repeated group Result = 1 {
    required string url = 2;
    optional string title = 3;
    repeated string snippets = 4;
  }
}

Second proto:

message SearchResponse {
  message Result {
    required string url = 2;
    optional string title = 3;
    repeated string snippets = 4;
  }

  repeated Result result = 1;
}